Some materials like hard rock, gravel, or sand weren’t meant to reach high temperatures and can spark and explode if your fire gets too hot. Instead, use lava rocks for your fire pit or lava glass beads as a filler for your fire pit.
Where do you put sand in a fire pit?
Basically, the layer of sand that you put at the bottom of your fire pit is designed to protect the metal that is used at the bottom of the bowl. The extreme heat produced by the fire needs to be absorbed, and sand does a good job of that. Sand in the desert is actually quite absorbent and can easily absorb the heat.
What is the best base for a fire pit?
Hard rocks like granite, marble, or slate are much denser, and therefore less likely to absorb water and explode when exposed to heat. Other rocks that are safe to use around and in your fire pit include fire-rate brick, lava glass, lava rocks, and poured concrete.
Is concrete OK for a fire pit?
Placing your fire pit on concrete is completely safe, but cracking might occur due to high temperatures. Taking the right steps before purchasing or installing a fire pit is your best defense against concrete damage.